App to shut off heat/AC if window is open for longer then specified time?

[MarkTr]

What thermostat are you using? If Ecobee, try (free) Ecobee Suite smartapp.

[DEPRECATED] Free Ecobee Suite, version 1.6.**

Universal Ecobee Suite, version 1.8.** Released As of February 23, 2020, the latest release of my Ecobee Suite can be found here: Release 1.6.** has been DEPRECATED Current users are encouraged to upgrade to the new Universal Ecobee Suite, version 1.8.** Highlights of This Release The most significant changes to 1.6.** include: New schedule/setSchedule support. Now supports the new SmartThings-defined Thermostat attribute/command for changing the running program. Additional documentation is available here in the SmartThings Community and also here on GitHub. New Android Optimizations added to Ecobee Suite Manager v1.6.13 and Ecobee Thermostat v1.6.15 Via a new preference setting in Ecobee Suite Manager (under Preferences), users can now specify the type of mobile device they are…